You may need a L3 switching solution with a routing fabric at the core running dual sups. This will give you your subnets, your fiber, and your port denstity and redundancy. You will need a WAN FLEX mod card to route traffic up to an isp or pop.

Also check this link out it maybe useful to you. This problem is uncommon, it may require further assistance from cisco. What hardware are you using?http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094050.shtml#sixth

The previous solution is good, a couple questions that I have, are there any remote locations included within your 19 subnets or are all 19 subets local to one location? Are you running GE Fiber? To ISP, Corporate Site, etc..?Running router on a st...

Are your cable modems ranging up on the CMTS?

In response to that. What hardware would you suggest if you wanted to design a OSPF network supporting up to 100-200 ospf processes per box.